Microscopic World -1-
(Mysteries of Atomic World)
Part 3: The Discovery of
the Particle of Light

The most fundamental theories
in physics
established
by the 19th century
were Newtonian mechanicsand Maxwellian
electromagnetism.
These theories are
generally called
the classical theory.
From the end
of the 19th century
to the beginning
of the 20th century,
many questionable points
which could not
be explained by
the classical theory
were revealed,
and the classical theory
came to a deadlock.
How was this
deadlock overcome?